Product Description
Genuine GM 12633511 LS3 Fuel Rails for L99, L76 and L77 Car Intake Manifolds
Fits 2007+ LS3 Rectangle-Port Car Intakes and Select 2005–2007 LS2 Applications
Complete or service a compatible LS3-style car intake manifold with Genuine GM fuel rail assembly 12633511. Designed for 2007-and-newer LS3 and rectangle-port car intake manifolds associated with 821, 823 and 5384 cylinder-head castings, these GM fuel rails provide the correct factory-style configuration for the supported intake applications.
GM 12633511 replaces previous GM part number 12572174 and also fits the original LS2 intake applications used on 2005–2007 Chevrolet Corvettes and 2005–2006 Pontiac GTOs. When paired with an LS3 car-style intake manifold, the rail assembly can be used with LS3, L99, LY6, L92, L96, L76, L77, L94 and LSA engine combinations. It is specifically designed for car intake manifolds and will not fit LS truck intake manifolds.
Key Features & Benefits
- Genuine GM Part Number 12633511: Manufactured as an original GM fuel-system component for compatible LS car intake manifolds. The exact GM identification provides a clear replacement reference when completing an intake assembly or replacing fuel rails requiring GM part number 12633511.
- Fits LS3 Rectangle-Port Car Intakes: Designed for 2007-and-newer LS3 and rectangle-port car intake manifolds associated with 821, 823 and 5384 cylinder-head castings. This application-specific compatibility distinguishes the assembly from rails manufactured for cathedral-port or LS truck intake manifolds.
- Select LS2 Vehicle Compatibility: Also fits the original LS2 engine applications found in 2005–2007 Chevrolet Corvettes and 2005–2006 Pontiac GTOs. This provides coverage for the supported LS2 car intake configuration in addition to later LS3-style rectangle-port applications.
- Supports Multiple LS Engine Combinations: When used with a compatible LS3 car-style intake manifold, GM 12633511 fits LS3, L99, LY6, L92, L96, L76, L77, L94 and LSA engine combinations. Compatibility is determined by the supported car intake-manifold configuration.
- Replaces GM Part Number 12572174: GM 12633511 serves as the replacement for previous GM fuel rail part number 12572174. Including both part numbers in the listing helps customers locate the current genuine GM fuel rail when searching by the earlier reference number.
Notes
- Fits compatible car intake manifolds only; will not fit LS truck intake manifolds.
- LY6, L92, L96, L94 and other listed engine combinations require a compatible LS3 car-style intake manifold.
Key Fitments
- 2007+ LS3 and rectangle-port car intake manifolds
- Rectangle-port applications with 821, 823 and 5384 cylinder-head castings
- 2005–2007 Chevrolet Corvette with LS2 engine
- 2005–2006 Pontiac GTO with LS2 engine
- LS3, L99, LY6, L92, L96, L76, L77, L94 and LSA engines using an LS3 car-style intake manifold
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perfect match to ls7 Fast LSXR 102 intake
This LS3 fuel rail is a perfect match with Fast LSXR 102 intake with Fast injector spacers, and Michigan Motorsports has the best price anywhere!
